Pin-wheel and star-wheel motion.



Patented May I3, 1902.

J. T. cvn. PIN WHEEL AND STAR WHEEL MOTION.

(Application filed nae. so, 1901.

2 Sheets-Sheet 1',

(No Model.)

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Patentedlllay I3,- I902.

J. T. CYB.

PIN WHEEL AND STAR WHEEL MOTION.

(Application filed Dsc. 30, 1901.)

- (No Model.)

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UNITED STATES PATENT OFF CE.

JOSEPH T. OYR, OF WORCESTER, MASSACHUSETTS, ASSIGNOR TO CROMP- TON &KNOWLES LOOM WORKS, OF W'ORCESTER, MASSACHUSETTS, A CORPORATION OFMASSACHUSETTS.

PIN-WHEEL AND STAR-WHEEL MOTION.

SPECIFICATION forming part of Letters Patent No. 699,910, dated May 13,1902. Application filed December 1901. Serial No. 87,657. (lilo model.)

To (LZZ whom it may concern:

I Be it known that I, JOSEPH T. CYR, a citizen of the United States,residing at Worcester, 1n the county of Worcester and State of. Mas-js'achusetts, have invented certainnew and useful Improvements inPin-Wheel and Star.-

Wheel Motions, of which the following is a specification.

My invention relates to a pin-wheel and star-wheel motion, technicallytermed G-eneva motion, in which a continuous rotation of the pin-wheelasa driver communicates an intermittent rotary motion to the starwheel.In the ordinary construction of this motion there is a liability of thestar-wheel moving or turning or not being held rigidly in positionafter. the driver-pin on the revolving pin-wheel passes out of theradial slot or recess in the periphery of the star-wheel and before thecurved offset fiange on the pinwheel engages a sufficient portion of thecorresponding-shaped recess in the periphery of the star-wheel to lockor hold the star-wheel and prevent its rotation until the continuedrotation of the pin-wheel causes the driver-pin to engage the nextradial slot or recess in the star-wheel to communicate another partialrotation thereto in the ordinary and well: known way. I

The object of my invention is to prevent any moving or turning of thestar-wheel ex cept when it is engaged by the driver-pin of' the rotatingpin-wheel and to provide addi tional means for looking or holding thestar wheel in proper position during the entire period of its rest ordwell, so that it cannot move after the driver-pin on the rotatingpinwheel passes out of the radial slot or recess in the periphery of thestar-wheel and until the driver-pin again enters the next radial slot orrecess in the continued rotation of the pin-wheel.

In carrying out my invention I provide in addition to the ordinarydriver-pin on the pinwheel two additional shorter pins which areattached to the pin-wheel on the same side as the longer driver-pin andon the same are of a circle as the driver-pin, with the three pins equaldistances apart. I provide on the side of the star-wheel contiguous tothe pin-wheel and at the edges thereof curved extensions or flangesbetween the radial slots, the curvature of which is concentric with thecurvature of the recesses or depressions in the riphery of thestar-wheel between the radial slots and the widthof which is a littleless than the distance between the curved ofiset flange on the pin-wheeland the two shorter pins thereon, all as will be hereinafter more fullydescribed.

Referring to the drawings, Figure 1 is a side view of a pin-wheel andstar-wheel motion embodying myimprovements. Fig. 2 is a vertical sectionon line 2 2, Fig. 1, looking in the direction of arrow a, same figure.Fig. 3 corresponds to Fig. 1, but shows the reverse view of thepin-wheel and star-wheel motion. Fig.

, 4: is an edge View of the parts shown in Fig.

3 looking in the direction of arrow 6, same figure. Fig.5 is an edgeview of the pinwheel mounted on its shaft looking in the direction ofarrow 0, Fig. 1. Fig. 6 is a sectional detail on line 6 6, Fig. 1,looking in the direction of arrow at, same figure. Fig. 7

corresponds to Fig. 1, but shows a difierent position of the pin-wheel;and Fig. 8 corresponds to Fig. l and Fig; 6, but shows a differentposition of the pin-wheel.

In the accompanying drawings, 1 is the pinwheel, in this instance keyedon a shaft 2, which is rotated continuously by any wellknown means. Thepin -wheel 1 has the driver-pin 3 and the curved ofiset flange 4 in theordinary way. The pin-wheel 1 also has the two additional pins 5 and6,'shorter than the driver-pin 3 and on the same side of the pin-wheelas said pin. The three pins 3, 5, and '6 are equal distances apart andin the same are of a circle.

The star-wheel 7 is in this instance keyed on a shaft 8 to communicatean intermittent rotary motion thereto. The star-wheel 7 has in thisinstance six radial slots or recesses 9 in its periphery to be engagedby the driverpin 3 of the pin-wheel 1 to communicate an intermittentrotary motion to the star-wheel 7 in the usual way. Intermediate theradial slots 9 the periphery of the star-wheel 7 has the concave curveddepressions or recesses 10, the curvature of which corresponds to thecurvature of the offset flange 4 on the pin-wheel 1 in the ordinary way.

Upon the side or face of the star-wheel 7 contiguous to the pinwheel 1and at the edges of the star-wheel are curved flanges or extensions 11,the curvature of which is concentric with the curvature of thedepressions or recesses 10 in the periphery of the starwheel and thewidth of which is a little less than the width or distances between thecurved olfset flange on the pin-wheel l and the two shorter pins 5 and6. (See Fig. 1.)

The operation of my pin-wheel and starwheel motion will be readilyunderstood by those skilled in the art. The continuous revolution of theshaft 2 communicates a continuous revolution to the pin-wheel 1, and theengagement of the driver-pin 3 with a radialslot 9 in the star-wheel 7communicates a partial revolution to said star-wheel, in this instance aone sixth revolution, and then there is a dwell of the star-wheel. In myimproved construction of the pin-wheel and star-wheel motion as thedriver-pin 3 on the pin-wheel 1 leaves a radial slot 9 in the starwheel7 after communicating a partial revolution to the star-wheel 7, as abovedescribed, one of the shorter pins, as 5, (see Fig. 1,) is just enteringthe outer end of the next radial slot 9 and engaging the inner edge ofthe curved flange or extension 11 at the edge of the star-wheel 7,andone end of the curved off set flange l on the pin-wheel l is engagingthe curved recess or depression 10 in the periphery of the star-wheel'7, the flange or eX- tension 11 passing between the pin 5 and theflange 4, as shown in Fig. 0. lVith the pin 5, the flange 11 on thestar-wheel 7, and the flange 4 on the pin-wheel, in the position abovedescribed and shownflin Fig. 1 the starwheel 7 is held or lockedsecurely in its position, and any movement thereof due to backlash orother causes is prevented. In the continued revolution of the pin-wheel1 the pin 5 travels over the inner edge of the curved flange 11 on thestar-wheel 7, being short enough to pass free of the flat face orsurface of the star-wheel contiguous to the pin-wheel, and the curvedflange 4 passes over the outer edge of the curved recessed portion 10 inthe periphery of the star-wheel 7 until the pin 5 passes out of theradial slot 9. As the pin 5 passes out of the radial slot 9 the pin 6passes into the first radial slot 9, as shown in Fig. 7, and occupiesthe position of the pin 5 shown in Fig. l and acts to hold and lock thestar-wheel 7 when released from the pin 5. In the continued revolutionof the pin-wheel l the pin 6 travels to the outer end of the next radialslot 9 and the driverpin 3 to the outer end of the previous radial slot9, as shown in Fig. 8, to communicate another partial revolution to thestar-wheel 7, after which partial revolution the star-wheel 7 andpin-wheel 1 will be in the position shown in Fig. 1, and the operationof lockingthe starwheel in position will be repeated, as abovedescribed. It will thus be seen that during the entire period of rest ordwell of the starwheel 7 the curved flange or extension 11 on thestar-wheel 7 is engaged and held between the curved flange 4 and one ofthe pins 5 or 6 on the pin-wheel 1 and is thus locked securely inposition during such time.

The advantages of my improvements will be readily appreciated by thoseskilled in the art. The star-wheel is firmly locked every time it comesto a stop. In the ordinary construction the star-wheel is left loosejust at the time the operating-pin comes out of the radial slot, and atthat very time if the strain is to be held back the pin cannot hold thestar-wheel steady.

It will be understood that the details of construction of myimprovementsmay be varied, if desired, and my pin-wheel and star wheel motion may beused in connection with any mechanism in which an intermittent rotarymotion from a continuous rotary motion is desired.

Instead of a star-wheel with six radial slots, as shown, a star-wheelwith four radial slots or eight or more radial slots may be used, ifpreferred.

I have shown in the drawings and described pins on the pin-wheel forengaging the radial slots in the star-wheel to lock the same; but itwill be understood that instead of pins rolls mounted on pins or otherequivalent devices may be used, if preferred.

Having thus described myinvention, what I claim as new, and desire tosecure by Letters Patent, is'

1. In a pin-wheel and star-wheel motion, a pinwheel having a driver-pin,a curved flange orextension, and two shorter pins, the three pins beingon the same are of a circle and equal distances from each other, and astar-wheel, having radial slots in its periphery, and concave recessesor depressions intermediate said slots, and curved flanges or extensionson one side near the edge, substantially as shown and described.

2. In a pin-wheel and star-wheel motion, a pin-wheel, having adriver-pin, a curved flange or extension, and two shorter pins, thethree pins being on the same are of a circle, and equal distances fromeach other, and a star-wheel, having radial slots in its periphery, andconcave recesses or depressions intermediate said slots, and curvedflanges or extensions on one side near the edge, the

width of said flanges being a little less than the width or distancebetween the curved flange on the pin-wheel and the two shorter pinsthereon, substantially as shown and described. v

3. In a pin-wheel and star-wheel motion, means for looking or holdingthe star-wheel in position during its rest or dwell, consisting of acurved'fiange or extension on the pin-' is at rest, substantiaHy asshown and dewheel, two shorter pins on the pin-wheel, in scribed. thesame are of a circle as the driver-pin, and equal distances apart, and acurved flange or 5 extension on the star-wheel, which extends Witnesses:

JOSEPH T. CYR.

between the two shorter pins and the curved J. C. DEWEY, flange on thepin-wheel, when the star-wheel M. HAAS.

A l/ t

